Context Sidebar

OpenCode V2 TUI sidebar plugin that displays context window usage, token counts, and session cost as a progress bar.

Rendered as the first element of the sidebar at all times — the plugin prepends to sidebar.content, so it sits above every section the host appends.

Features

• Visual progress bar showing context window usage percentage
• Color-coded bar (success → warning → error as usage increases)
• Displays token count, context window limit, and session cost
• Mirrors the host's context math: last assistant step after the most recent compaction, respecting reverts
• Updates in real-time via the reactive V2 data layer

Installation

opencode2 plugin add @npv12/opencode-context-sidebar

Or add to your cli.json:

{
  "plugins": ["@npv12/opencode-context-sidebar/tui"]
}

Requires OpenCode 0.0.0-beta-17963 or compatible. Not compatible with V1.

To avoid duplicating the built-in Context section, disable it:

{
  "plugins": ["@npv12/opencode-context-sidebar/tui", "-opencode.sidebar.context"]
}

Attribution

This plugin is adapted from streetturtle's context-progress plugin in the opencode-better-sidebar repository.

License

MIT